AD9136-EBZ datasheet(27/117 Pages) AD

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Data Sheet

AD9135/AD9136

Rev. C | Page 27 of 117

STEP 2: DIGITAL DATAPATH

This section describes which interpolation filters to use and

how to set the data format being used. Additional digital

features are available, including digital gain scaling and an

inverse sinc filter used to improve pass-band flatness. Table 22

provides further details on the feature blocks available.

Table 18. Digital Datapath Settings

Addr.

Bit

No.

Value1

Variable

Description

0x112

InterpMode

Select interpolation mode;

see the Interpolation section.

0x110

DataFmt

DataFmt = 0 if twos

complement; DataFmt = 1

if unsigned binary.

1 0x denotes a register value that the user must fill in. See the Variable and

Description columns for information on selecting the appropriate register value.

STEP 3: TRANSPORT LAYER

This section describes how to set up the JESD204B links. The

parameters are determined by the desired JESD204B operating

mode. See the JESD204B Setup section for details.

Table 19 shows the register settings for the transport layer. If

using dual-link mode, perform writes from Register 0x300 to

set of register writes with CurrentLink = 1 (Register 0x200 and

Table 19. Transport Layer Settings

Addr.

Bit

No.

Value1

Variable

Description

0x200

0x00

Power up the interface.

0x201

UnusedLanes

See the JESD204B

Setup section.

0x300

CheckSumMode

See the JESD204B

Setup section.

DualLink

See the JESD204B

Setup section.

CurrentLink

See the JESD204B

Setup section.

0x450

DID

Set DID to match the

device ID sent by the

transmitter.

0x451

BID

Set BID to match the

bank ID sent by the

transmitter.

0x452

LID

Set LID to match the

lane ID sent by the

transmitter.

0x453

Scrambling

See the JESD204B

Setup section.

[4:0]

L − 12

See the JESD204B

Setup section.

0x454

F − 12

See the JESD204B

Setup section.

0x455

K − 12

See the JESD204B

Setup section.

0x456

M − 12

See the JESD204B

Setup section.

0x457

N − 12

N = 16.

0x458

[7:5]

Subclass

See the JESD204B

Setup section.

[4:0]

NP − 12

NP = 16.

0x459

[7:5]

JESDVer

JESDVer = 1 for

JESD204B, JESDVer = 0

for JESD204A.

[4:0]

S − 12

See the JESD204B

Setup section.

0x45A

See the JESD204B

Setup section.

[4:0]

CF must equal 0.

0x45D

Lane0Checksum

See the JESD204B

Setup section.

0x46C

Lanes

Deskew lanes. See the

JESD204B Setup

section.

0x476

See the JESD204B

Setup section.

0x47D

Lanes

Enable lanes. See the

JESD204B Setup

section.

1 0x denotes a register value that the user must fill in. See the Variable and

Description columns for information on selecting the correct register value.

2 This JESD204B link parameter is programmed in n − 1 notation as noted. For

example, if the setup requires L = 8 (8 lanes per link), program L − 1 or 7 into

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